jumping from `12.1.3 listoffloats' back to `12.1.1 float'. In the Info development sources, it works correctly, so evidently it's been fixed in the interim.
Thanks for the doc patch, will install (something like) it, I guess. So few manuals are not hierarchically structured (the only one I know of is Info itself, sigh), I somewhat worry that even mentioning it in this sort of context is more confusing than helpful.
